rec.bicycles.racing
http://groups.google.com/group/rec.bicycles.racing?hl=enrec.bicycles.racing@googlegroups.com
Today's topics:
* 20110210 Update on Jobst - 7 messages, 6 authors
http://groups.google.com/group/rec.bicycles.racing/t/975afab5072ea1d0?hl=en
* George Carlin On Lance - 3 messages, 3 authors
http://groups.google.com/group/rec.bicycles.racing/t/591e13955d7ad7d5?hl=en
* Schrader valves - 6 messages, 4 authors
http://groups.google.com/group/rec.bicycles.racing/t/82ef4e7d4cf38f0e?hl=en
* Bicycle Foam Hats - 4 messages, 2 authors
http://groups.google.com/group/rec.bicycles.racing/t/bedcc49318390206?hl=en
* Bonds Case - 5 messages, 3 authors
http://groups.google.com/group/rec.bicycles.racing/t/d77c1703148a4e11?hl=en
==============================================================================
TOPIC: 20110210 Update on Jobst
http://groups.google.com/group/rec.bicycles.racing/t/975afab5072ea1d0?hl=en
==============================================================================
== 1 of 7 ==
Date: Thurs, Feb 10 2011 7:54 am
From: RicodJour
On Feb 10, 10:05 am, Brad Anders <pband...@gmail.com> wrote:
>
> Jobst is being moved to a trauma rehabilitation facility (Valley
> Medical Center) later today. He's made some good progress in the past
> two days, both mentally and physically, and is ready for the rehab
> process. When I get more details on how to contact or visit Jobst, I
> will relay the information to the group. Jobst is communicating better
> and is much more mobile, taking walks around the ward. He's also
> regaining his appetite.
Excellent news. The walking around is huge, as is the appetite.
Brad, did you ever think of going into PR? You seem to have an
affinity for it. Me? I'm just an attention whore. ;)
R
== 2 of 7 ==
Date: Thurs, Feb 10 2011 9:09 am
From: BLafferty
On 2/10/2011 10:05 AM, Brad Anders wrote:
> Jobst is being moved to a trauma rehabilitation facility (Valley
> Medical Center) later today. He's made some good progress in the past
> two days, both mentally and physically, and is ready for the rehab
> process. When I get more details on how to contact or visit Jobst, I
> will relay the information to the group. Jobst is communicating better
> and is much more mobile, taking walks around the ward. He's also
> regaining his appetite.
>
> Brad Anders
Good news. I'd still like to know what wheels he was riding and if they
survived.
== 3 of 7 ==
Date: Thurs, Feb 10 2011 11:59 am
From: Brad Anders
On Feb 10, 10:09 am, BLafferty <b...@nowhere.com> wrote:
> Good news. I'd still like to know what wheels he was riding and if they
> survived.
I don't know if they survived, but I'm pretty sure Jobst has been
riding the same design wheels for years. Shimano cassette hubs, 36
spoke front and rear, 3 cross, with 15/17 gauge spokes, and Mavic
MA-40 silver finished rims (or something similar).
== 4 of 7 ==
Date: Thurs, Feb 10 2011 12:13 pm
From: Art Harris
Brad Anders wrote:
>
> > Good news. I'd still like to know what wheels he was riding and if they
> > survived.
>
> I don't know if they survived, but I'm pretty sure Jobst has been
> riding the same design wheels for years. Shimano cassette hubs, 36
> spoke front and rear, 3 cross, with 15/17 gauge spokes, and Mavic
> MA-40 silver finished rims (or something similar).
>
MA-2 rims, and I'm pretty sure the spokes are 15/16 gauge.
I'm curious about the fate of the frame. He doesn't have a backup, and
it's not a stock size!
Art Harris
== 5 of 7 ==
Date: Thurs, Feb 10 2011 2:48 pm
From: AMuzi
>>> Good news. I'd still like to know what wheels he was riding and if they
>>> survived.
> Brad Anders wrote:
>> I don't know if they survived, but I'm pretty sure Jobst has been
>> riding the same design wheels for years. Shimano cassette hubs, 36
>> spoke front and rear, 3 cross, with 15/17 gauge spokes, and Mavic
>> MA-40 silver finished rims (or something similar).
Art Harris wrote:
> MA-2 rims, and I'm pretty sure the spokes are 15/16 gauge.
> I'm curious about the fate of the frame. He doesn't have a backup, and
> it's not a stock size!
It is, up to 68cm, at Gunnar:
http://gunnarbikes.com/site/bikes/roadie/
and Jobst is well connected with various Bay Area
framebuilders with a bank of good will throughout the
industry. Equipment is not a problem here.
--
Andrew Muzi
<www.yellowjersey.org/>
Open every day since 1 April, 1971
== 6 of 7 ==
Date: Thurs, Feb 10 2011 3:56 pm
From: Brad Anders
On Feb 10, 1:13 pm, Art Harris <n...@hotmail.com> wrote:
> Brad Anders wrote:
>
> > > Good news. I'd still like to know what wheels he was riding and if they
> > > survived.
>
> > I don't know if they survived, but I'm pretty sure Jobst has been
> > riding the same design wheels for years. Shimano cassette hubs, 36
> > spoke front and rear, 3 cross, with 15/17 gauge spokes, and Mavic
> > MA-40 silver finished rims (or something similar).
>
> MA-2 rims, and I'm pretty sure the spokes are 15/16 gauge.
Thanks, you're right.
== 7 of 7 ==
Date: Thurs, Feb 10 2011 5:04 pm
From: SMS
On 2/10/2011 12:13 PM, Art Harris wrote:
> Brad Anders wrote:
>>
>>> Good news. I'd still like to know what wheels he was riding and if they
>>> survived.
>>
>> I don't know if they survived, but I'm pretty sure Jobst has been
>> riding the same design wheels for years. Shimano cassette hubs, 36
>> spoke front and rear, 3 cross, with 15/17 gauge spokes, and Mavic
>> MA-40 silver finished rims (or something similar).
>>
>
> MA-2 rims, and I'm pretty sure the spokes are 15/16 gauge.
Tied and soldered.
==============================================================================
TOPIC: George Carlin On Lance
http://groups.google.com/group/rec.bicycles.racing/t/591e13955d7ad7d5?hl=en
==============================================================================
== 1 of 3 ==
Date: Thurs, Feb 10 2011 9:07 am
From: BLafferty
On 2/10/2011 8:55 AM, Anton Berlin wrote:
> On Feb 10, 7:49 am, BLafferty<b...@nowhere.com> wrote:
>> On 2/10/2011 8:19 AM, --D-y wrote:
>>
>>> On Feb 9, 1:15 pm, BLafferty<b...@nowhere.com> wrote:
>>
>>> (DR I believe it was wrote):
>>>>> It's a little hard to believe that nobody ever brought it to your
>>>>> attention in light of your perpetual and monotone theme.
>>
>>> (BL replied):
>>>> Difficult to believe, but still easier to believe than Armstrong not
>>>> being a long term doper.
>>
>>> It might be somewhat ironic in this context that Carlin was, by his
>>> own admission, a doper (long term? unknown) whose performance suffered
>>> from use of PED's, also by his own admission.
>>> No dispute on the "national treasure" deal; him and Richard Pryor,
>>> both, many are standing on their shoulders, for better or worse.
>>> --D-y
>>
>> I don't think the "dope" Carlin used was necessarily performance
>> enhancing--although it might have been; just not of an immediate nature.
>
> Dope definitely enhanced Carlin - and his audience.
Reminds me of wathching the Antonioni film Zabriskie Point stoned.
Great film. One of my professors saw it and didn't like it. When I
suggested he watch it stoned he did, along with his wife, and then
thought it was one of the best films ever made.
== 2 of 3 ==
Date: Thurs, Feb 10 2011 11:41 am
From: Simply Fred
BLafferty wrote:
> Reminds me of wathching the Antonioni film Zabriskie Point stoned. Great
> film. One of my professors saw it and didn't like it. When I suggested
> he watch it stoned he did, along with his wife, and then thought it was
> one of the best films ever made.
Perhaps you should watch LANCE[,] stoned.
== 3 of 3 ==
Date: Thurs, Feb 10 2011 12:34 pm
From: DirtRoadie
On Feb 10, 12:41 pm, Simply Fred <n...@mailinator.com> wrote:
> BLafferty wrote:
> > Reminds me of wathching the Antonioni film Zabriskie Point stoned. Great
> > film. One of my professors saw it and didn't like it. When I suggested
> > he watch it stoned he did, along with his wife, and then thought it was
> > one of the best films ever made.
>
> Perhaps you should watch LANCE[,] stoned.
It does make one wonder how he prepares for posting here. Hmmm, I
wonder if his posts would be any better.....
Oh, never mind.
DR
==============================================================================
TOPIC: Schrader valves
http://groups.google.com/group/rec.bicycles.racing/t/82ef4e7d4cf38f0e?hl=en
==============================================================================
== 1 of 6 ==
Date: Thurs, Feb 10 2011 10:22 am
From: DirtRoadie
On Feb 9, 7:21 pm, "carlfo...@comcast.net" <carlgrayfo...@gmail.com>
wrote:
> On Feb 9, 5:58 pm, Plano Dude <tx.wastel...@gmail.com> wrote:
>
> > It has been a long standing storyhttp://www.roadbikeaction.com/Most-Popular-Stories/content/67/3777/Fi...
> > that during John Howard's Bonneville speed runs he kept getting soft
> > tires because the Schrader valves were creeping open during his runs
> > due to centrifugal force.
>
> > You can buy plenty of out of the factory cars now that can easily
> > eclipse the 100 mph that supposedly caused the problem. Same for
> > motorcycles and of course race cars. I have seen tires with speed
> > ratings, but never heard of speed ratings for Schrader valves.
>
> > Sounds to me like the story is a crock. Anyone have something
> > different to add?
>
> Dear PD,
>
> Howard's single flat occurred on a 150 mph run (not 100 mph), with a
> vertical valve stem (not an angled car valve stem).
>
> A thread that discussed the details:
>
> http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/83...
Interesting discussion and the G-force figures all seem accurate.
But I didn't follow there where it was stated:
" The short pin weighed only 3 grams, while the long pin weighed 4
grams:
http://i39.tinypic.com/302x9gg.jpg "
Looks to me like there's a decimal point missing from the 3g and 4g
figures. For comparison I quickly weighed 5 complete Schrader cores
(not just pins) at ~ 4g = .8 g each.
The 3000g (~6.6 lbs) spring force just sounded high to me. And,
indeed, loading a digital scale with partially compressed Schrader
core I get something more in the range of <400g. That's rough since I
was simply holding the valve pin against the scale platform. So that
somewhat offsets the apparent 10x error in pin weight above
But one thing that seems to not have been discussed in the thread is
the additional effect of tire pressure in keeping the valve closed.
Using .01 sq. in. as the affected area and 70 psi as the tire pressure
there's another 317g worth of valve closure force - perhaps nearly
matching doubling the spring force.
I have no firm conclusion. There are too many guesstimates involved.
But there doesn't seem to be any clear reason to suggest that the
original claims were false.
DR
== 2 of 6 ==
Date: Thurs, Feb 10 2011 2:09 pm
From: Michael Press
In article
<f01ee97d-4777-4907-8ebc-75b4f25cae7b@z31g2000vbs.googlegroups.com>,
DirtRoadie <DirtRoadie@aol.com> wrote:
> On Feb 9, 7:21 pm, "carlfo...@comcast.net" <carlgrayfo...@gmail.com>
> wrote:
> > On Feb 9, 5:58 pm, Plano Dude <tx.wastel...@gmail.com> wrote:
> >
> > > It has been a long standing storyhttp://www.roadbikeaction.com/Most-Popular-Stories/content/67/3777/Fi...
> > > that during John Howard's Bonneville speed runs he kept getting soft
> > > tires because the Schrader valves were creeping open during his runs
> > > due to centrifugal force.
> >
> > > You can buy plenty of out of the factory cars now that can easily
> > > eclipse the 100 mph that supposedly caused the problem. Same for
> > > motorcycles and of course race cars. I have seen tires with speed
> > > ratings, but never heard of speed ratings for Schrader valves.
> >
> > > Sounds to me like the story is a crock. Anyone have something
> > > different to add?
> >
> > Dear PD,
> >
> > Howard's single flat occurred on a 150 mph run (not 100 mph), with a
> > vertical valve stem (not an angled car valve stem).
> >
> > A thread that discussed the details:
> >
> > http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/83...
>
> Interesting discussion and the G-force figures all seem accurate.
>
> But I didn't follow there where it was stated:
> " The short pin weighed only 3 grams, while the long pin weighed 4
> grams:
> http://i39.tinypic.com/302x9gg.jpg "
>
> Looks to me like there's a decimal point missing from the 3g and 4g
> figures. For comparison I quickly weighed 5 complete Schrader cores
> (not just pins) at ~ 4g = .8 g each.
>
> The 3000g (~6.6 lbs) spring force just sounded high to me. And,
> indeed, loading a digital scale with partially compressed Schrader
> core I get something more in the range of <400g. That's rough since I
> was simply holding the valve pin against the scale platform. So that
> somewhat offsets the apparent 10x error in pin weight above
>
> But one thing that seems to not have been discussed in the thread is
> the additional effect of tire pressure in keeping the valve closed.
> Using .01 sq. in. as the affected area and 70 psi as the tire pressure
> there's another 317g worth of valve closure force - perhaps nearly
> matching doubling the spring force.
>
> I have no firm conclusion. There are too many guesstimates involved.
> But there doesn't seem to be any clear reason to suggest that the
> original claims were false.
Effects you did not mention and are very difficult
to even estimate are cyclic and stochastic
forces from rotation, bumps, and vibration.
--
Michael Press
== 3 of 6 ==
Date: Thurs, Feb 10 2011 5:06 pm
From: DirtRoadie
On Feb 10, 4:07 pm, john B. <johnbsloc...@gmail.com> wrote:
> On Thu, 10 Feb 2011 10:22:53 -0800 (PST), DirtRoadie
>
>
>
>
>
> <DirtRoa...@aol.com> wrote:
> >On Feb 9, 7:21 pm, "carlfo...@comcast.net" <carlgrayfo...@gmail.com>
> >wrote:
> >> On Feb 9, 5:58 pm, Plano Dude <tx.wastel...@gmail.com> wrote:
>
> >> > It has been a long standing storyhttp://www.roadbikeaction.com/Most-Popular-Stories/content/67/3777/Fi...
> >> > that during John Howard's Bonneville speed runs he kept getting soft
> >> > tires because the Schrader valves were creeping open during his runs
> >> > due to centrifugal force.
>
> >> > You can buy plenty of out of the factory cars now that can easily
> >> > eclipse the 100 mph that supposedly caused the problem. Same for
> >> > motorcycles and of course race cars. I have seen tires with speed
> >> > ratings, but never heard of speed ratings for Schrader valves.
>
> >> > Sounds to me like the story is a crock. Anyone have something
> >> > different to add?
>
> >> Dear PD,
>
> >> Howard's single flat occurred on a 150 mph run (not 100 mph), with a
> >> vertical valve stem (not an angled car valve stem).
>
> >> A thread that discussed the details:
>
> >> http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/83...
>
> >Interesting discussion and the G-force figures all seem accurate.
>
> >But I didn't follow there where it was stated:
> >" The short pin weighed only 3 grams, while the long pin weighed 4
> >grams:
> >http://i39.tinypic.com/302x9gg.jpg"
>
> >Looks to me like there's a decimal point missing from the 3g and 4g
> >figures. For comparison I quickly weighed 5 complete Schrader cores
> >(not just pins) at ~ 4g = .8 g each.
>
> >The 3000g (~6.6 lbs) spring force just sounded high to me. And,
> >indeed, loading a digital scale with partially compressed Schrader
> >core I get something more in the range of <400g. That's rough since I
> >was simply holding the valve pin against the scale platform. So that
> >somewhat offsets the apparent 10x error in pin weight above
>
> >But one thing that seems to not have been discussed in the thread is
> >the additional effect of tire pressure in keeping the valve closed.
> >Using .01 sq. in. as the affected area and 70 psi as the tire pressure
> >there's another 317g worth of valve closure force - perhaps nearly
> >matching doubling the spring force.
>
> >I have no firm conclusion. There are too many guesstimates involved.
> >But there doesn't seem to be any clear reason to suggest that the
> >original claims were false.
>
> >DR
>
> Was this some time in the past?
>
> I ask as there are available today, off the shelf, tire pressure
> monitoring systems rated to around 180 MPH, and probably some rated to
> higher speeds, that are used by competition cars. It would seem as
> though running on the salt flats would be a logical place for them as
> I would think a high speed run would tend to raise pressures somewhat.
> There are also pressure control systems that adjust tire pressure
> automatically while running, mostly used by circle track cars, I
> believe.
>
> By the way, in the past valve caps incorporated a seal so that
> tightening them firmly sealed the valve completely. Sadly no longer
> common.
Past? Yes ancient.
References:
http://sportsillustrated.cnn.com/vault/article/magazine/MAG1119704/index.htm
(note the media "spin" on the air loss issue P. 2)
Also
http://www.youtube.com/watch?v=Py94okBKDU0
To simplify, the question was just now posed (again?) as to whether
the air loss issue was myth or fact.
So there has been some more numerical flogging based upon best
guesses.
In Mythbusters parlance, the air loss seems plausible.
DR
== 4 of 6 ==
Date: Thurs, Feb 10 2011 6:47 pm
From: thirty-six
On Feb 11, 1:06 am, DirtRoadie <DirtRoa...@aol.com> wrote:
> On Feb 10, 4:07 pm, john B. <johnbsloc...@gmail.com> wrote:
>
>
>
> > On Thu, 10 Feb 2011 10:22:53 -0800 (PST), DirtRoadie
>
> > <DirtRoa...@aol.com> wrote:
> > >On Feb 9, 7:21 pm, "carlfo...@comcast.net" <carlgrayfo...@gmail.com>
> > >wrote:
> > >> On Feb 9, 5:58 pm, Plano Dude <tx.wastel...@gmail.com> wrote:
>
> > >> > It has been a long standing storyhttp://www.roadbikeaction.com/Most-Popular-Stories/content/67/3777/Fi...
> > >> > that during John Howard's Bonneville speed runs he kept getting soft
> > >> > tires because the Schrader valves were creeping open during his runs
> > >> > due to centrifugal force.
>
> > >> > You can buy plenty of out of the factory cars now that can easily
> > >> > eclipse the 100 mph that supposedly caused the problem. Same for
> > >> > motorcycles and of course race cars. I have seen tires with speed
> > >> > ratings, but never heard of speed ratings for Schrader valves.
>
> > >> > Sounds to me like the story is a crock. Anyone have something
> > >> > different to add?
>
> > >> Dear PD,
>
> > >> Howard's single flat occurred on a 150 mph run (not 100 mph), with a
> > >> vertical valve stem (not an angled car valve stem).
>
> > >> A thread that discussed the details:
>
> > >> http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/83...
>
> > >Interesting discussion and the G-force figures all seem accurate.
>
> > >But I didn't follow there where it was stated:
> > >" The short pin weighed only 3 grams, while the long pin weighed 4
> > >grams:
> > >http://i39.tinypic.com/302x9gg.jpg"
>
> > >Looks to me like there's a decimal point missing from the 3g and 4g
> > >figures. For comparison I quickly weighed 5 complete Schrader cores
> > >(not just pins) at ~ 4g = .8 g each.
>
> > >The 3000g (~6.6 lbs) spring force just sounded high to me. And,
> > >indeed, loading a digital scale with partially compressed Schrader
> > >core I get something more in the range of <400g. That's rough since I
> > >was simply holding the valve pin against the scale platform. So that
> > >somewhat offsets the apparent 10x error in pin weight above
>
> > >But one thing that seems to not have been discussed in the thread is
> > >the additional effect of tire pressure in keeping the valve closed.
> > >Using .01 sq. in. as the affected area and 70 psi as the tire pressure
> > >there's another 317g worth of valve closure force - perhaps nearly
> > >matching doubling the spring force.
>
> > >I have no firm conclusion. There are too many guesstimates involved.
> > >But there doesn't seem to be any clear reason to suggest that the
> > >original claims were false.
>
> > >DR
>
> > Was this some time in the past?
>
> > I ask as there are available today, off the shelf, tire pressure
> > monitoring systems rated to around 180 MPH, and probably some rated to
> > higher speeds, that are used by competition cars. It would seem as
> > though running on the salt flats would be a logical place for them as
> > I would think a high speed run would tend to raise pressures somewhat.
> > There are also pressure control systems that adjust tire pressure
> > automatically while running, mostly used by circle track cars, I
> > believe.
>
> > By the way, in the past valve caps incorporated a seal so that
> > tightening them firmly sealed the valve completely. Sadly no longer
> > common.
>
> Past? Yes ancient.
> References:http://sportsillustrated.cnn.com/vault/article/magazine/MAG1119704/in...
> (note the media "spin" on the air loss issue P. 2)
> Alsohttp://www.youtube.com/watch?v=Py94okBKDU0
>
> To simplify, the question was just now posed (again?) as to whether
> the air loss issue was myth or fact.
> So there has been some more numerical flogging based upon best
> guesses.
> In Mythbusters parlance, the air loss seems plausible.
>
> DR
My cousin came off after decelerating from in excess of 150mph. It
seemed that tyre deflation was likely the cause of his fall at over
100mph.
== 5 of 6 ==
Date: Thurs, Feb 10 2011 6:52 pm
From: DirtRoadie
On Feb 10, 7:47 pm, thirty-six <thirty-...@live.co.uk> wrote:
> On Feb 11, 1:06 am, DirtRoadie <DirtRoa...@aol.com> wrote:
>
>
>
>
>
> > On Feb 10, 4:07 pm, john B. <johnbsloc...@gmail.com> wrote:
>
> > > On Thu, 10 Feb 2011 10:22:53 -0800 (PST), DirtRoadie
>
> > > <DirtRoa...@aol.com> wrote:
> > > >On Feb 9, 7:21 pm, "carlfo...@comcast.net" <carlgrayfo...@gmail.com>
> > > >wrote:
> > > >> On Feb 9, 5:58 pm, Plano Dude <tx.wastel...@gmail.com> wrote:
>
> > > >> > It has been a long standing storyhttp://www.roadbikeaction.com/Most-Popular-Stories/content/67/3777/Fi...
> > > >> > that during John Howard's Bonneville speed runs he kept getting soft
> > > >> > tires because the Schrader valves were creeping open during his runs
> > > >> > due to centrifugal force.
>
> > > >> > You can buy plenty of out of the factory cars now that can easily
> > > >> > eclipse the 100 mph that supposedly caused the problem. Same for
> > > >> > motorcycles and of course race cars. I have seen tires with speed
> > > >> > ratings, but never heard of speed ratings for Schrader valves.
>
> > > >> > Sounds to me like the story is a crock. Anyone have something
> > > >> > different to add?
>
> > > >> Dear PD,
>
> > > >> Howard's single flat occurred on a 150 mph run (not 100 mph), with a
> > > >> vertical valve stem (not an angled car valve stem).
>
> > > >> A thread that discussed the details:
>
> > > >> http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/83...
>
> > > >Interesting discussion and the G-force figures all seem accurate.
>
> > > >But I didn't follow there where it was stated:
> > > >" The short pin weighed only 3 grams, while the long pin weighed 4
> > > >grams:
> > > >http://i39.tinypic.com/302x9gg.jpg"
>
> > > >Looks to me like there's a decimal point missing from the 3g and 4g
> > > >figures. For comparison I quickly weighed 5 complete Schrader cores
> > > >(not just pins) at ~ 4g = .8 g each.
>
> > > >The 3000g (~6.6 lbs) spring force just sounded high to me. And,
> > > >indeed, loading a digital scale with partially compressed Schrader
> > > >core I get something more in the range of <400g. That's rough since I
> > > >was simply holding the valve pin against the scale platform. So that
> > > >somewhat offsets the apparent 10x error in pin weight above
>
> > > >But one thing that seems to not have been discussed in the thread is
> > > >the additional effect of tire pressure in keeping the valve closed.
> > > >Using .01 sq. in. as the affected area and 70 psi as the tire pressure
> > > >there's another 317g worth of valve closure force - perhaps nearly
> > > >matching doubling the spring force.
>
> > > >I have no firm conclusion. There are too many guesstimates involved.
> > > >But there doesn't seem to be any clear reason to suggest that the
> > > >original claims were false.
>
> > > >DR
>
> > > Was this some time in the past?
>
> > > I ask as there are available today, off the shelf, tire pressure
> > > monitoring systems rated to around 180 MPH, and probably some rated to
> > > higher speeds, that are used by competition cars. It would seem as
> > > though running on the salt flats would be a logical place for them as
> > > I would think a high speed run would tend to raise pressures somewhat.
> > > There are also pressure control systems that adjust tire pressure
> > > automatically while running, mostly used by circle track cars, I
> > > believe.
>
> > > By the way, in the past valve caps incorporated a seal so that
> > > tightening them firmly sealed the valve completely. Sadly no longer
> > > common.
>
> > Past? Yes ancient.
> > References:http://sportsillustrated.cnn.com/vault/article/magazine/MAG1119704/in...
> > (note the media "spin" on the air loss issue P. 2)
> > Alsohttp://www.youtube.com/watch?v=Py94okBKDU0
>
> > To simplify, the question was just now posed (again?) as to whether
> > the air loss issue was myth or fact.
> > So there has been some more numerical flogging based upon best
> > guesses.
> > In Mythbusters parlance, the air loss seems plausible.
>
> > DR
>
> My cousin came off after decelerating from in excess of 150mph. It
> seemed that tyre deflation was likely the cause of his fall at over
> 100mph.
Details?
DR
== 6 of 6 ==
Date: Thurs, Feb 10 2011 6:56 pm
From: Plano Dude
On Feb 10, 8:47 pm, thirty-six <thirty-...@live.co.uk> wrote:
> On Feb 11, 1:06 am, DirtRoadie <DirtRoa...@aol.com> wrote:
>
>
>
> > On Feb 10, 4:07 pm, john B. <johnbsloc...@gmail.com> wrote:
>
> > > On Thu, 10 Feb 2011 10:22:53 -0800 (PST), DirtRoadie
>
> > > <DirtRoa...@aol.com> wrote:
> > > >On Feb 9, 7:21 pm, "carlfo...@comcast.net" <carlgrayfo...@gmail.com>
> > > >wrote:
> > > >> On Feb 9, 5:58 pm, Plano Dude <tx.wastel...@gmail.com> wrote:
>
> > > >> > It has been a long standing storyhttp://www.roadbikeaction.com/Most-Popular-Stories/content/67/3777/Fi...
> > > >> > that during John Howard's Bonneville speed runs he kept getting soft
> > > >> > tires because the Schrader valves were creeping open during his runs
> > > >> > due to centrifugal force.
>
> > > >> > You can buy plenty of out of the factory cars now that can easily
> > > >> > eclipse the 100 mph that supposedly caused the problem. Same for
> > > >> > motorcycles and of course race cars. I have seen tires with speed
> > > >> > ratings, but never heard of speed ratings for Schrader valves.
>
> > > >> > Sounds to me like the story is a crock. Anyone have something
> > > >> > different to add?
>
> > > >> Dear PD,
>
> > > >> Howard's single flat occurred on a 150 mph run (not 100 mph), with a
> > > >> vertical valve stem (not an angled car valve stem).
>
> > > >> A thread that discussed the details:
>
> > > >> http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/83...
>
> > > >Interesting discussion and the G-force figures all seem accurate.
>
> > > >But I didn't follow there where it was stated:
> > > >" The short pin weighed only 3 grams, while the long pin weighed 4
> > > >grams:
> > > >http://i39.tinypic.com/302x9gg.jpg"
>
> > > >Looks to me like there's a decimal point missing from the 3g and 4g
> > > >figures. For comparison I quickly weighed 5 complete Schrader cores
> > > >(not just pins) at ~ 4g = .8 g each.
>
> > > >The 3000g (~6.6 lbs) spring force just sounded high to me. And,
> > > >indeed, loading a digital scale with partially compressed Schrader
> > > >core I get something more in the range of <400g. That's rough since I
> > > >was simply holding the valve pin against the scale platform. So that
> > > >somewhat offsets the apparent 10x error in pin weight above
>
> > > >But one thing that seems to not have been discussed in the thread is
> > > >the additional effect of tire pressure in keeping the valve closed.
> > > >Using .01 sq. in. as the affected area and 70 psi as the tire pressure
> > > >there's another 317g worth of valve closure force - perhaps nearly
> > > >matching doubling the spring force.
>
> > > >I have no firm conclusion. There are too many guesstimates involved.
> > > >But there doesn't seem to be any clear reason to suggest that the
> > > >original claims were false.
>
> > > >DR
>
> > > Was this some time in the past?
>
> > > I ask as there are available today, off the shelf, tire pressure
> > > monitoring systems rated to around 180 MPH, and probably some rated to
> > > higher speeds, that are used by competition cars. It would seem as
> > > though running on the salt flats would be a logical place for them as
> > > I would think a high speed run would tend to raise pressures somewhat.
> > > There are also pressure control systems that adjust tire pressure
> > > automatically while running, mostly used by circle track cars, I
> > > believe.
>
> > > By the way, in the past valve caps incorporated a seal so that
> > > tightening them firmly sealed the valve completely. Sadly no longer
> > > common.
>
> > Past? Yes ancient.
> > References:http://sportsillustrated.cnn.com/vault/article/magazine/MAG1119704/in...
> > (note the media "spin" on the air loss issue P. 2)
> > Alsohttp://www.youtube.com/watch?v=Py94okBKDU0
>
> > To simplify, the question was just now posed (again?) as to whether
> > the air loss issue was myth or fact.
> > So there has been some more numerical flogging based upon best
> > guesses.
> > In Mythbusters parlance, the air loss seems plausible.
>
> > DR
>
> My cousin came off after decelerating from in excess of 150mph. It
> seemed that tyre deflation was likely the cause of his fall at over
> 100mph.
I'm betting the cause was gravity.
==============================================================================
TOPIC: Bicycle Foam Hats
http://groups.google.com/group/rec.bicycles.racing/t/bedcc49318390206?hl=en
==============================================================================
== 1 of 4 ==
Date: Thurs, Feb 10 2011 4:37 pm
From: Tºm Shermªn™ °_° <""twshermanREMOVE\"@THI$southslope.net">
On 2/10/2011 7:55 AM, Duane Hebert wrote:
> On 2/9/2011 6:58 PM, Tºm Shermªn™ °_° > wrote:
> <snip>
>
>> Yes, bicycle foam hats will do a lot to protect someone hit by a fast
>> moving motor vehicle.
>
> They probably won't help much against nuclear explosions, decapitation
> by angry French mobs or Vogon poetry either. But if I'm sliding across
> the tarmac I'm probably not thinking about French mobs. Vogon poetry
> maybe...
>
>
As long as you are not thinking of the poetry of Paula Nancy Millstone
Jennings, you should be OK.
--
Tºm Shermªn - 42.435731,-83.985007
I am a vehicular cyclist.
== 2 of 4 ==
Date: Thurs, Feb 10 2011 4:39 pm
From: Tºm Shermªn™ °_° <""twshermanREMOVE\"@THI$southslope.net">
On 2/10/2011 9:17 AM, Brad Anders wrote:
> On Feb 9, 6:16 pm, Nate Nagel<njna...@roosters.net> wrote:
>
>> thanks for the update, glad to hear that he is making progress even if
>> it is "slowly."
>>
>> Any details on what exactly happened, or is that being kept private?
>
> While there seems to be a lot of conjecture about it, not too much is
> known about the details of the accident. Jobst went out early (~7 AM)
> by himself on a Saturday to do a ride in the Santa Cruz mountains. On
> the way over, he had a single-bike crash at the intersection of Sand
> Hill and Whiskey Hill roads. From what I understand, it appears he ran
> into or slid along the concrete median next to the edge of the road.[...]
See
<http://maps.google.com/maps?f=q&source=s_q&hl=en&q=Sandhill+Rd+%26+Whiskey+Hill+Rd,+San+Mateo,+California+94062&sll=37.0625,-95.677068&sspn=33.847644,86.572266&ie=UTF8&geocode=FS_bOgId18C2-A&split=0&hq=&hnear=Sandhill+Rd+%26+Whiskey+Hill+Rd,+San+Mateo,+California+94062&ll=37.412289,-122.240555&spn=0.001464,0.002642&t=h&z=19>.
--
Tºm Shermªn - 42.435731,-83.985007
I am a vehicular cyclist.
== 3 of 4 ==
Date: Thurs, Feb 10 2011 5:06 pm
From: Tºm Shermªn™ °_° <""twshermanREMOVE\"@THI$southslope.net">
On 2/9/2011 11:14 PM, kolldata aka AVAGADRO IV/V wrote:
>
>
> lotta people can't hold there liquour ya know.
> coupla asprin, Ripple, and off they go hold up the gas station, wave
> toy guns at the Sheriff's Posse, do 135 in a 25 zone...tip over
> ancient tombstones, beat up old jews...
>
> sedated to keep him of the bike !
Has Ripple been sold in the last 3 decades?
See <http://www.bumwine.com/others.html>.
--
Tºm Shermªn - 42.435731,-83.985007
I am a vehicular cyclist.
== 4 of 4 ==
Date: Thurs, Feb 10 2011 6:44 pm
From: Stephen Bauman
On Thu, 10 Feb 2011 07:17:02 -0800, Brad Anders wrote:
> While there seems to be a lot of conjecture about it, not too much is
> known about the details of the accident. Jobst went out early (~7 AM) by
> himself on a Saturday to do a ride in the Santa Cruz mountains. On the
> way over, he had a single-bike crash at the intersection of Sand Hill
> and Whiskey Hill roads. From what I understand, it appears he ran into
> or slid along the concrete median next to the edge of the road. I do not
> know how he was found, or who called paramedics. The only injury that I
> know that he suffered in the crash was a mid-shaft break of the femur. I
> do not know if he hit his head, or if he was wearing a helmet
> (doubtful). Nobody to my knowledge knows what caused the accident or if
> there were any other vehicles involved. To my knowledge, Jobst has not
> given any details of what happened, either.
>
Let me add my conjecture from the comfort of an armchair at a distance of
3000 miles from the scene. This is based on Google Maps, Google Street
View and DeLorme's Topo USA.
This is a 3-way intersection at the bottom of a hill. There was an
altitude drop of 110 to 140 feet, depending upon which way Jobst was
traveling. I'd therefore assume that Jobst approached the intersection at
a fairly good speed in anticipation of powering up the climb past the
intersection.
The side road (Whiskey Hill Rd) intersects the through road (Sand Hill
Rd) at a 45 degree angle. The turning angle for a right turn onto the
side road would be 135 degrees. They added cut ahead of the intersection
to make for a more gentle turning angle. There is right turn lane before
the cut and a triangle after the cut that blocks the right turn lane. The
triangle is dirt that is separated from the roadway by raised concrete
edging about 2 or 3 inches in height above the roadway.
My guess is that a car turning right passed Jobst before he could move
into the through lane. Moreover, Jobst was probably going around 20-25
mph and the car not much faster. That meant it took a long time for the
car to pass Jobst. I'll also guess that there was a car approaching at
high speed in the through lane, when Jobst finally had clearance to move
left. Jobst did not have enough room or time move to the left by the time
the second car passed him. He was up against the triangle with its 2 inch
raised concrete edging before he could turn right or move to the through
lane.
It's just a guess.
--
Stephen Bauman
==============================================================================
TOPIC: Bonds Case
http://groups.google.com/group/rec.bicycles.racing/t/d77c1703148a4e11?hl=en
==============================================================================
== 1 of 5 ==
Date: Thurs, Feb 10 2011 4:49 pm
From: Brad Anders
http://news.yahoo.com/s/ap/20110211/ap_on_sp_ba_ne/bbn_bonds_steroids
== 2 of 5 ==
Date: Thurs, Feb 10 2011 5:41 pm
From: Michael Press
In article
<0428e49f-3fb8-4a82-b44d-c8f23fc9b6ae@w7g2000pre.googlegroups.com>,
Brad Anders <pbanders@gmail.com> wrote:
> http://news.yahoo.com/s/ap/20110211/ap_on_sp_ba_ne/bbn_bonds_steroids
I have a summons for jury service on a case beginning
21 March 2011 and expected to last a few months, in
Federal District Court, Northern District of California.
--
Michael Press
== 3 of 5 ==
Date: Thurs, Feb 10 2011 7:06 pm
From: Brad Anders
On Feb 10, 6:41 pm, Michael Press <rub...@pacbell.net> wrote:
> In article
> <0428e49f-3fb8-4a82-b44d-c8f23fc9b...@w7g2000pre.googlegroups.com>,
> Brad Anders <pband...@gmail.com> wrote:
>
> >http://news.yahoo.com/s/ap/20110211/ap_on_sp_ba_ne/bbn_bonds_steroids
>
> I have a summons for jury service on a case beginning
> 21 March 2011 and expected to last a few months, in
> Federal District Court, Northern District of California.
>
> --
> Michael Press
Too bad you can't trade with Laff.
== 4 of 5 ==
Date: Thurs, Feb 10 2011 7:09 pm
From: Anton Berlin
On Feb 10, 6:49 pm, Brad Anders <pband...@gmail.com> wrote:
> http://news.yahoo.com/s/ap/20110211/ap_on_sp_ba_ne/bbn_bonds_steroids
A buddy of Bond's is willing to take one for the team ( if getting
boned up the ass by a team for several years is considered 'taking one
for the team )
Which of Lance's buddies will be willing to get anally raped while
Lance misappropriates Livestrong funds on family vacations?
== 5 of 5 ==
Date: Thurs, Feb 10 2011 7:10 pm
From: Anton Berlin
On Feb 10, 7:41 pm, Michael Press <rub...@pacbell.net> wrote:
> In article
> <0428e49f-3fb8-4a82-b44d-c8f23fc9b...@w7g2000pre.googlegroups.com>,
> Brad Anders <pband...@gmail.com> wrote:
>
> >http://news.yahoo.com/s/ap/20110211/ap_on_sp_ba_ne/bbn_bonds_steroids
>
> I have a summons for jury service on a case beginning
> 21 March 2011 and expected to last a few months, in
> Federal District Court, Northern District of California.
>
> --
> Michael Press
You probably just DQ'd yourself. Good trick - jury duty sucks.
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